What is an EdCamp? According to edutopia, Edcamps are: Free to all participants; A free-flow of ideas and information about education, education technology and best practices for teachers; An unconference model of sessions throughout the day for spontaneous topics, chats and activities; The ability of being a presenter is at your discretion (and courage)
Tanning bed bulbs and lamps should be replaced when they have been used to 80 percent of their expected life cycle, and typically hit this mark about one year after they have been installed. Low-pressure lamps have a life cycle of 300 to 1,700 hours, while high-pressure bulbs last 300 to 9,500 hours.
Medal Halide bulbs (except the 1000 w Super Bulb) should be replaced about every 9500-10000 hours or aprox.18 months (assuming an 18 hour / day on cycle). The 100 w super bulbs do not last as long as any of the others and should be replaced every 6500 hours, which is about 12 months if you run the bulb 18 hours a day. HPS bulbs are the most efficient bulbs that are commonly used by the hobby gardener.